Resonator of filter



FIG. 1 is a perspective view of a resonator of filter showing our newdesign;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left-side view thereof;

FIG. 5 is a right-side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines shown in the drawings depict portions of the resonatorof filter that form no part of the claimed design.

CLAIM We claim the ornamental design for a resonator of filter, as shownand described.